1 Nicholson St. is a 19-storey office building in Nicholson Street, East Melbourne, Victoria, Australia. Begun in 1955 to house the headquarters of the Australian subsidiary of Imperial Chemical Industries, it was the tallest building in Australia upon completion in 1958. It broke Melbourne's longstanding 132 ft height limit and was the first International Style skyscraper in the country. It symbolised progress, modernity, efficiency and corporate power in postwar Melbourne, and heralded the construction of the high-rise office buildings, changing the shape of Australia's major urban centres forever.